P0152 Isuzu HO2S21 Sensor Circuit High Voltage

P0152 Isuzu HO2S21 Sensor Circuit High Voltage

Possible causes
– Faulty Front Heated Oxygen Sensor Bank 2
– Intake air leaks may be faulty
– Exhaust gas leaks
– Front Heated Oxygen Sensor Bank 2 harness is open or shorted
– Front Heated Oxygen Sensor Bank 2 circuit poor electrical connection
– Inappropriate fuel pressure
– Faulty fuel injectors
Tech description
Replacing the Front Heated Oxygen Sensor Bank 2 usually takes care of the problem
What about the obd code?
An excessively high voltage from the sensor is sent to Engine Control Module (ECM).
Symptoms
– Engine Light ON (or Service Engine Soon Warning Light)
– High Fuel Consumption
– Excessive Smoke from Exhaust
P0152 Isuzu Description

The front heated oxygen sensor (or O2 sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the Engine Control Module (ECM). The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

Isuzu Vehicle:2013 Isuzu,2012 Isuzu,2011 Isuzu,2010 Isuzu,2009 Isuzu,2008 Isuzu,2007 Isuzu,2006 Isuzu,2005 Isuzu,2004 Isuzu,2003 Isuzu,2002 Isuzu,2001 Isuzu,2000 Isuzu,1999 Isuzu,1998 Isuzu,1997 Isuzu,1996 Isuzu,Isuzu Rodeo,Isuzu Trooper,Isuzu Ascender
CategoriesUncategorized